Question

A girl is carrying a school bag of 3kg mass on her back and moves 200m on a leveled road.the work done against the gravitational force will be​

Answer 1

Answer:Zero

Explanation:

Because distance from the ground and bag will be same so that work done against gravity will be zero. As Work done = Displacement×Force×cos(theta) so bag do not change its position therefore displacement is zero hence work is zero.